Why It Matters For Looking
Losing fat is easy when you are sensitive to insulin.
Your body loses fat first which is the fat around your organs.
Gaining muscle is also easier because your body uses carbohydrates to build muscle of storing them as fat.
When you have insulin levels you are more likely to get acne and have oily skin.
If you are sensitive to insulin you will have skin.
Example

Insulin sensitivity also affects your face.
If you have insulin levels and inflammation you may retain water and have a puffy face even if you have a low body fat percentage.
If you fix your insulin sensitivity you will have a jawline.
Insulin sensitivity also affects your hormones.
If you are sensitive to insulin you will have free testosterone and less cortisol, which is a stress hormone.
If you have insulin sensitivity it can be hard to look good no matter how much you lift weights or diet.